Form 1040-X, Amended U.S. Individual Income Tax Return.
The IRS has started to accept electronically filed Forms 1040-X. Currently, only tax year 2019 Forms 1040 and 1040-SR can be amended electronically. Additional improvements are planned for the future. You can still file a paper Form 1040-X and should follow the instructions for preparing and submitting the paper form. For more info, see irs.gov.
